devel/bmake: disable cmd-interrupt test in batch builds

This fixes the build under modern poudriere, but continues to run the test
in all other environments so that we *can* catch issues here if they arise.

The breakage should get fixed on the poudriere or base sh(1) side, but this
will not necessarily be done soon.

Reported by:	mjg
Approved by:	portmgr (implicit, bulk fix)
MFH:		2020Q4 (blanket: trivial build fix)

devel/bmake/Makefile

@@ -17,6 +17,10 @@ WRKSRC=		${WRKDIR}/${PORTNAME}
 
 MAKE_ENV+=	CONFIG_SITE=${CONFIG_SITE}
 
+.if defined(BATCH)
+EXTRA_PATCHES=	${FILESDIR}/extrapatch-unit-tests_Makefile
+.endif
+
 post-patch:	.SILENT
 	${REINPLACE_CMD} 's/^\.Nx/NetBSD/' ${WRKDIR}/bmake/bmake.1
 

devel/bmake/files/extrapatch-unit-tests_Makefile

@@ -0,0 +1,11 @@
+--- unit-tests/Makefile.orig	2020-10-05 03:28:18 UTC
++++ unit-tests/Makefile
+@@ -36,7 +36,7 @@
+ # src/tests/usr.bin/make/t_make.sh as well.
+ TESTS+=		# archive	# broken on FreeBSD, enabled in t_make.sh
+ TESTS+=		archive-suffix
+-TESTS+=		cmd-interrupt
++TESTS+=		# cmd-interrupt
+ TESTS+=		cmdline
+ TESTS+=		comment
+ TESTS+=		cond-cmp-numeric